/*******************************************************************************
* Copyright (c) 2010, 2011 LogSaw project and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* LogSaw project committers - initial API and implementation
*******************************************************************************/
package net.sf.logsaw.ui.viewers;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.StringReader;
import java.util.Date;
import net.sf.logsaw.core.field.ALogEntryField;
import net.sf.logsaw.core.field.ILogEntryFieldVisitor;
import net.sf.logsaw.core.field.Level;
import net.sf.logsaw.core.field.LogEntry;
import net.sf.logsaw.core.field.model.DateLogEntryField;
import net.sf.logsaw.core.field.model.LevelLogEntryField;
import net.sf.logsaw.core.field.model.StringLogEntryField;
import net.sf.logsaw.core.logresource.ILogResource;
import net.sf.logsaw.ui.Messages;
import net.sf.logsaw.ui.UIPlugin;
import org.apache.commons.io.IOUtils;
import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.swt.graphics.Image;
/**
* A simple label provider for log entries
*
* @author Philipp Nanz
*/
public class LogEntryTableLabelProvider extends LabelProvider implements
ITableLabelProvider {
// Local image registry for all log level icons that are provided by the dialect
private ImageRegistry imageRegistry = new ImageRegistry();
private ALogEntryField<?, ?>[] fields;
private ILogResource log;
/**
* @param log the log to set
*/
public void setLog(ILogResource log) {
this.log = log;
}
/**
* @param fields the fields to set
*/
public void setFields(ALogEntryField<?, ?>[] fields) {
this.fields = fields;
}
private Image getImageFromRegistry(String iconPath) {
Assert.isNotNull(iconPath, "iconPath must not be null"); //$NON-NLS-1$
Image img = imageRegistry.get(iconPath);
if (img == null) {
imageRegistry.put(iconPath, UIPlugin.imageDescriptorFromPlugin(
log.getDialect().getFactory().getContributor(), iconPath));
img = imageRegistry.get(iconPath);
}
return img;
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ITableLabelProvider#getColumnImage(java.lang.Object, int)
*/
@Override
public Image getColumnImage(Object element, int columnIndex) {
if ((columnIndex == 0) && (log.getDialect().getFieldProvider().getLevelField() != null)) {
// The icon column
LogEntry entry = (LogEntry) element;
Level level = entry.get(log.getDialect().getFieldProvider().getLevelField());
String iconPath = log.getDialect().getFieldProvider().getLevelField().getLevelProvider().getIconPathForLevel(level);
if (iconPath != null) {
// Lookup icon in local image registry
return getImageFromRegistry(iconPath);
}
}
return null;
}
private String snipAtLinebreak(String str) {
String firstLine = null;
BufferedReader reader = new BufferedReader(new StringReader(str));
try {
firstLine = reader.readLine();
if ((firstLine != null) && (firstLine.length() != str.length())) {
return firstLine + Messages.LogEntryTableLabelProvider_snipSuffix;
}
} catch (IOException e) {
// Should not happen, and if it happens it's no big deal
} finally {
IOUtils.closeQuietly(reader);
}
return str;
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ITableLabelProvider#getColumnText(java.lang.Object, int)
*/
@Override
public String getColumnText(Object element, int columnIndex) {
if (columnIndex == 0) {
// The icon column
return ""; //$NON-NLS-1$
}
final LogEntry entry = (LogEntry) element;
if ((columnIndex - 1) < fields.length) {
final String[] ret = new String[1];
// Setup visitor
ILogEntryFieldVisitor visitor = new ILogEntryFieldVisitor() {
/* (non-Javadoc)
* @see net.sf.logsaw.core.model.ILogEntryFieldVisitor#visit(net.sf.logsaw.core.model.StringLogEntryField)
*/
@Override
public void visit(StringLogEntryField fld) {
String value = entry.get(fld);
if (value != null) {
ret[0] = snipAtLinebreak(fld.toInputValue(value, log));
}
}
/* (non-Javadoc)
* @see net.sf.logsaw.core.model.ILogEntryFieldVisitor#visit(net.sf.logsaw.core.model.LevelLogEntryField)
*/
@Override
public void visit(LevelLogEntryField fld) {
Level value = entry.get(fld);
if (value != null) {
ret[0] = fld.toInputValue(value, log);
}
}
/* (non-Javadoc)
* @see net.sf.logsaw.core.model.ILogEntryFieldVisitor#visit(net.sf.logsaw.core.model.DateLogEntryField)
*/
@Override
public void visit(DateLogEntryField fld) {
Date value = entry.get(fld);
if (value != null) {
ret[0] = fld.toInputValue(value, log);
}
}
};
ALogEntryField<?, ?> fld = fields[columnIndex - 1];
fld.visit(visitor);
if ((ret[0] == null) || (ret[0].length() == 0)) {
return Messages.LogEntryTableLabelProvider_emptyValue;
}
return ret[0];
}
return Messages.LogEntryTableLabelProvider_emptyValue;
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.BaseLabelProvider#dispose()
*/
@Override
public void dispose() {
imageRegistry.dispose();
super.dispose();
}
}